About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Characterization of Nuclear Materials and Fuels with Advanced X-ray and Neutron Techniques
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Presentation Title |
Irradiation-induced Effects in HT-UPS Steel Using Far-field X-ray Diffraction and Grain Tracking Analysis |
Author(s) |
Sri Tapaswi Nori, Alejandro Figueroa , Jonova Thomas, Hemant Sharma, Jun-Sang Park, Peter Kenesei, Jonathan Almer, Maria Okuniewski |
On-Site Speaker (Planned) |
Sri Tapaswi Nori |
Abstract Scope |
High-temperature ultrafine-precipitate-strengthened (HT-UPS) steel is an austenitic stainless steel, known for its high-strength and creep resistance at elevated temperatures (>400℃). It is a candidate structural material for advanced nuclear reactors. However, its neutron irradiation tolerance is not well known. Hence, this research utilized far-field high-energy diffraction microscopy experiments which were conducted on neutron-irradiated (0.3 dpa at 600℃) HT-UPS steel sample to obtain diffraction patterns, both pre- and post-irradiation within the same region of the specimen. A unique grain tracking methodology was used by comparing the diffraction spots of pre- and post-irradiation states to reveal the evolution of grains with neutron irradiation. These results are being further validated using higher resolution three-dimensional electron back scattered diffraction/scanning electron microscopy that utilizes a serial sectioning approach. Thus the grain evolution and its validation, along with the correlation with lower length scale features such as precipitates, will be presented. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Characterization, Other |